update to illumos sysroot 20210501

[gwr]

Update the sysroot for illumos to this one:
https://github.com/illumos/sysroot/releases/#release-20210501-e0b4275f34-v0

[rustbot]

Thanks for the pull request, and welcome! The Rust Project has assigned @ubiratansoares (or someone else) to review your changes, you should hear from them (or someone else) within the next two weeks.

Please see the contribution instructions and our LLM policy for more information.

Why was this reviewer chosen?

The reviewer was selected based on:

• Owners of files modified in this PR: infra-ci
• infra-ci expanded to Kobzol, Mark-Simulacrum, jieyouxu, marcoieni, ubiratansoares
• Random selection from Mark-Simulacrum, marcoieni, ubiratansoares

[gwr]

Closes #150756

[tgross35]

@bors try jobs=dist-x86_64-illumos

[bjorn3]

Do we not store the toolchain in our own S3 bucket?

[nikic]

Do we not store the toolchain in our own S3 bucket?

A question for @Kobzol, but my understanding is that we mostly don't bother mirroring GitHub-hosted artifacts, because our CI is bound to GitHub anyway?

[rust-bors]

💔 Test for bfd8f2e failed: CI

[nikic]

@bors try jobs=dist-x86_64-illumos

Timeout

[Kobzol]

I guess it would be nicer to mirror it from our CDN, but you're right that if downloading from GitHub fails, we're probably also having other issues with CI.

[bjorn3]

Mirroring to our CDN does protect against upstream deleting the release for whatever reason, right?

[Kobzol]

Yes, that's a good point.

[rust-bors]

☀️ Try build successful (CI)
Build commit: 4015989 (401598979106b3e36fe99d77a421b4a2fe2614c7)
Base parent: 6510953 (6510953ce01859dc271e3285cf539e03d0d781e7)

[rustbot]

Some changes occurred in src/doc/rustc/src/platform-support

cc @Noratrieb

[gwr]

Added platform notes hoping to satisfy:
#150756 (comment)

[rust-log-analyzer]

The job aarch64-gnu-llvm-21-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

##[endgroup]
[TIMING:end] tool::ToolBuild { build_compiler: Compiler { stage: 0, host: aarch64-unknown-linux-gnu, forced_compiler: false }, target: aarch64-unknown-linux-gnu, tool: "linkchecker", path: "src/tools/linkchecker", mode: ToolBootstrap, source_type: InTree, extra_features: [], allow_features: "", cargo_args: [], artifact_kind: Binary } -- 0.110
[TIMING:end] tool::Linkchecker { compiler: Compiler { stage: 0, host: aarch64-unknown-linux-gnu, forced_compiler: false }, target: aarch64-unknown-linux-gnu } -- 0.000
##[group]Testing stage1 Linkcheck (aarch64-unknown-linux-gnu)
rustc/print.html:20157: broken link - `/checkout/obj/build/ci/docker/scripts/illumos-toolchain.sh`
rustc/platform-support/illumos.html:215: broken link - `/checkout/obj/build/ci/docker/scripts/illumos-toolchain.sh`
checked links in: 24.2s
number of HTML files scanned: 62538
number of HTML redirects found: 22220
number of links checked: 2990273
number of links ignored due to external: 186172
number of links ignored due to exceptions: 31
number of intra doc links ignored: 9
errors found: 2
found some broken links
NOTE: if you are adding or renaming a markdown file in a mdBook, don't forget to register the page in SUMMARY.md
Bootstrap failed while executing `--stage 2 test --skip tidy --skip intrinsic-test --skip src/tools/rust-analyzer --skip tests --skip library --skip tidyselftest`
Currently active steps:
test::Linkcheck { host: aarch64-unknown-linux-gnu } at src/bootstrap/src/core/build_steps/test.rs:162
Command `/checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools-bin/linkchecker /checkout/obj/build/aarch64-unknown-linux-gnu/doc` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/tool.rs:1627:23
Executed at: src/bootstrap/src/core/build_steps/test.rs:225:77

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:35:32
  local time: Wed Aug 26 15:43:28 UTC 2026
  network time: Wed, 26 Aug 2026 15:43:29 GMT
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"

[ubiratansoares]

@gwr @Kobzol raised rust-lang/ci-mirrors#56 just in case

[ubiratansoares]

@gwr rust-lang/ci-mirrors#56 was merged, feel free to fetch from our mirrors if you want.